Wrench.



G. C. PANGRATZ.

WRENCH.

APPLICATION FILED 111111115, 1911.

1 ,026, 1 74;, Patented 14, "1812.

W/ T/VESSES [Ml 51V TOR w a I) 6 Q 61611511115 i 1 7 M UNITED sra'rns PATENT ()FFICE GEORGE C. PANGRATZ, F ATHENS, OHIO, ASSIGNOE- ONE-HALF TO JAMES T. BANAHAN, -OF ATHENS, OHIO.

WRENCH.

I To all whom it may concern:

Be it known that I, Gnomes C. ldixoni'rz,

a citizen of the United States, residing at Athens, in the county of Athens and State of Ohio, have invented certain new and useful Improvements in lVrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wrenches and more particularly to that class of wrenches known as monkey wrenches.

An object of the invention is to provide a monkey wrench which may he quickly and easily adjusted.

Another object is to provide a wrench of the above stated character, which will be of simple construction and positive in operation.

Another object is to provide a wrench ol' the rack and worm wheel type, which may be instantaneously adjusted to regulate the distance between the jaws of the wrench, and, another object is to provide a wrench Of this nature in which the worm wheel may be rotated while in engagement with, the rack to adjust the traveling jaw in relation to the stationary jaw and in which the worm Wheel may be temporarily disengaged from said rack and the traveling jaw instantaneously adjusted along the shank of the wrench.

Other objects and advantages will be here- -inafter set forth and pointed out in the specification and claim.

In the accompanying drawings which are made a part of this application, Figure l is a side View of the wrench, the handle being broken away, and, Fig. 2 is a view similar to Fig. 1 the movable jaw being shown in section to more clearily illustrate the parts.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 indicates the stationary jaw upon the outer end of the shank 2, which has an ordinary -'.handle 8 connected to its opposite end. The

shankis provided along its inner edge with the usual rack 4:, which is adapted to be engaged by the 'worm wheel 5, which has its ends suitably curved to allow the worm wheel shaftti, upon which the worm wheel Specification of Letters Patent.

Application filed June 15, 1911.

- Patented May 14, 1912.

Serial No. 633,259.

is mounted, to swing upon its pivot pin 7. The pivot pin 7 is secured transversely through the movable jaw 8 adjacent the worm wheel opening 9 within the front face of said jaw. It will be understood that the jaw 8 surrounds the shank 2 and is moved longitiulinally thereon to adjust the movable jaw in relation to the stationary jaw 1.

v .\t the point at which the pin 7 is secured through the jaw 8, the latter is provided with a recess 10 to accommodate the enlarged end of the worm wheel shaft (3. The jaw 8 is also provided with a recess T1 to the opposite side of the worm wheel opening 9, to accommodate the free end of the worm wheel shaft 6. The shaft 6 is normally held in such position that the" worm wheel 5 is engaged with the rack t, the extremity of the free end of the shaft resting within a suitable opening in the leaf spring 12, the adj acentend of said leaf spring being forced outwardly by the extremity of the shaft, while the latter is being forced into the re cess 11, said spring flying back against the adjacent face of the jaw 8 as the free end of the shaft is seated and the extremity thereof assumes a position opposite the opening of the sprin at which moment said extremity will be received within the opening. The leaf spring 12 is secured at its opposite end to the back portion of the jaw 8 by the screw 13 or other suitable means, said spring having an opening therethrough to accommodate the shaft 2. This movable jaw 8 may be instantaneously adjusted along the shank 2 by pulling the free end of the spring 12 away from said jaw and raising the free end of the worm wheel shaft (3 out of the recess 11 sufliciently to disengage the worm wheel 5 from the rack 4, after which theaw may be freely moved adjacent face of the jaw 8, the'extremity 'ot the free end of the shaft 6 being caught in the shaft opening through the spring and thus held against casual release from the recess '11. it will be understood that the worm wheel 5, on account of its curved ends,

beiiig'hulged adjacent the shaft G and S10 ed outwardly toward the circumference o v the w01'h1'wl1eel, -will freely pass th'ejf corners produced by providing the pinionppening 9 through the. jaw 8, making 'it possible for the shaft Gfto freely swing upon its pivot-pin 7 It will be understood that the-Worm wheel 5 may be rotatedon 7 theshaft 6 for anyfsmall adjustment, which is specially desirable when making slight adjustments of; the movable jaw 8.

It will be seen that this wrench is extreni'ely simpleiin construction and operaj l'tion and' will.beihighly eflicient in use. It

will lalsolbefseen' that either small or large adjustmentsof'the niovahlejaw- 8 along the shankQ-may be made instantaneously.

Owingtothe extremely small number of parts and'th'e simple formation of these "parts, it 'will' be readily apparent that the same may be manufactured and sold at an extremely'low figure.

VVhat I claim is: I v A wrench having a toothed shank carrying a fixed jaw, a jaw movable thereon hava ing open intersecting transverse and longitudinal slots, an adjusting worm wheel having a shaft, said worm. wheel engaging the shank and seated-in the transverse slot and a leafspring carriedby the movable jaw and engaging the shaft of the worm wheel to hold it in the longitudinal slot asset forth.

In testimony whereof, I have signed my name to this specification in the presence of 

